Missing cow

Yesterday I got a call from a friend saying that my cow was running down the middle of the road.  So I jumped onto my handy dandy ATV and roared off to find her.  I find her in my neighbors field with his cows and a Humongous bull!  So a got my lead rope and walked( very bravely I might add)  into the pasture to retrieve my cow.   Keeping a very close eye on the bull I got to about 20 feet away, and called "Lucy".  Lucy looked up at me with her beautiful big jersey eyes, mooed and  walked  over behind the bull.  She looked at me again and I swear she was laughing!  I go and talk to my neighbor and he said that the bull is really very gentle. OK, here we go again.  I walked confidently up to the herd of cows(animals can smell fear you know)  and the promptly ran to the other side of the pasture. 45 minutes later after a friends help and twisting my ankle by slipping in a cow pie I had my cow back into my possession.  Now to figure out how on earth she got out.  I checked everything; the gate, the fence, the barn and there was no way she could escape.  Then as I walked by the chicken coop that is connected to her barn I see a mess.  Sure enough as I look at the door between her barn and the chicken coop I see that Lucy nosed open the latch and went right through the chicken coop and on to freedom.  Great now I have to outsmart my cow!